Where to Take Fluid Samples.

TB 55-1500-334-25

The following table consists of information on how

3-3. Where to Take Fluid Samples.

and where to sample components.

Aircraft

Components

How To Sample

Where to Sample

UH-1, AH-1

Hydraulic System(s)

15" x 3/8" tubing

Filler neck

OH-58

Hydraulic System

15" x 3/8" tubing

Filler neck

CH-47

Flight Control Systems (2)

15" x 3/8" tubing

Filler neck

Utility Hydraulic System

Drain into sample

Bleed valve of

bottle

Utility hydraulic

system return line

CH-54

First Stage System

15" x 3/8" Tubing

Filler Neck

Second Stage System

Utility System

Cargo System

OV-1

Hydraulic System

15" x 3/8" tubing

Filler neck

UH-60A

See TM 55-1520-237-23-4

Servicing

Hydraulic Test Stands

15" x 3/8" tubing

Filler neck

Equipment

NOTE

If proper procedures are followed for

conversion of hydraulic dispensers (app.

F), there is no requirement of fluid

sampling. If the presence of MIL-H-5606

is suspected in a converted system, a

sample can be drawn by pressing the red

button valve and draining the fluid into a

sampling bottle.

to prevent contamination. Size, source, and National

3-4. Sampling Supplies.

Stock Numbers (NSN) are listed below. Tubes are issued

Sampling Tubes.

Sampling tubes are

in bags of 25.

polyethylene tubes which have been sealed on both ends

NATIONAL STOCK NUMBER

SIZE

SOURCE

4710-00-933-4415

15" long x 3/8" OD

B-17

b. Sampling Bottle. The sampling bottle is a 4-

oz, polyethylene, screw cap bottle. The National Stock

Number and source are listed below.

NATIONAL STOCK NUMBER

TYPE

UNIT OF ISSUE

SOURCE

8125-00-174-0855

Polyethylene

Each

S9G

c. Sack, Shipping. The mailing bag is the air

insulated sack listed below:

NATIONAL STOCK NUMBER

SIZE

UNIT OF ISSUE

SOURCE

8105-00-290-0340

6" x 10"

250 each per carton

GKO

Change 5

3-2